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2. Make sure that the maintenance switches of all UPSs (including new unit) are in the same
positions (either in the positions of “UPS” or “BPS”) when the UPS parallel system is going
to be in INV mode!
3. Normally, when maintenance bypass switch cover is opened, the UPS will transfer to
bypass automatically, and the maintenance bypass switch can be operated, but for safety
reasons, check the status of the UPS from LED display, make sure the UPS is on bypass
mode before operating maintenance bypass.
